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i've tried every method that has been explained on the forum and still no progress

i can host any other game including tf2, garrysmod, css etc but when it comes to the hidden, my game doesn't list on the internet servers and on lan (when switch over to sv_lan 1 ofcourse )

yes i've tried sv_master_legacy_mode 0/1 but makes no difference either way, all the necessary ports have been forwarded and that still makes no difference. this is a fresh install (no plugins, no custom maps etc) and still will not list

i can connect to my other games so it's not a isp nor connectivity issue (ports etc.)

i've tried every method that has been explained on the forum and still no progress

i can host any other game including tf2, garrysmod, css etc but when it comes to the hidden, my game doesn't list on the internet servers and on lan (when switch over to sv_lan 1 ofcourse )

yes i've tried sv_master_legacy_mode 0/1 but makes no difference either way, all the necessary ports have been forwarded and that still makes no difference. this is a fresh install (no plugins, no custom maps etc) and still will not list

i can connect to my other games so it's not a isp nor connectivity issue (ports etc.)

anyone else having problems lately with vac? sometimes its just working fine and after a few mapchanges it says "Couldn't etablish connection to steam servers" and VAC gets disabled... its really annoying

I've figured it out. After trying everything suggested on here, and on other forums, nothing seemed to work. I kept running into the same problems as everyone else. Server supposedly "outdated" or viceversa, not showing up in the server list, and only on the LAN list. But I've taken knowledge from all of your posts, and came up with a really cheesy, but effective work around. I'm sharing it because I know how frustrating this all has been, and I'd really like to see the Hidden community boom again in hopes that the developers will continue this wonderful project, and not pull at Black Mesa: Source on us.

1. Go to, and open with a text editor, your server's "server.cfg" in your ...\hidden\cfg folder.
2. Copy the code below and paste it at the VERY END of the text area.

This is a temporary fix until someone comes up with a better solution.

Not only does it show up in the server list, it doesn't give you that out of date error. Should also show up in your LAN and if you've saved it to favorite, in there as well. If you've already connected, guess what... It'll be in your history too! It's magical! Cheesy! BUT MAGICAL!

I hope this helps.

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For people having problems with the ports...
It's a lot of hit and miss, I know, but keep trying!

27015 and 27016 on both UDP/TCP should be in your port forwarding section, if you log into your router. Make sure you have them assigned to your Static IP/Internal IP. NOT your external IP. Should look something like 192.168.X.X - ALSO make sure your firewall isn't blocking those ports or that Static IP. Sometimes you can turn the firewall off all-together.